<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        class="treeTable"
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            type="success"
            size="mini"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt" slot-scope="scope">
          <el-button
            type="primary"
            icon="el-icon-edit"
            size="mini"
            @click="showEditDialog(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
            @click="removeCategoryById(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="querInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类的对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 添加分类的表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <!--  options 用来指定数据源  props  用来指定配置对象 -->
          <el-cascader
            :options="parentCateList"
            :props="cascaderProps"
            v-model="selectedKeys"
            @change="parentCateChanged"
            expand-trigger="hover"
            clearable
            change-on-select
          >
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改分类的对话框 -->
    <el-dialog title="修改分类" :visible.sync="editDialogVisible" width="50%">
      <el-form
        :model="addCateForm"
        ref="editFormRef"
        label-width="100px"
        @close="editDialogClosed"
      >
        <el-form-item label="分类名称">
          <el-input v-model="editFormList.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="排序">
          <el-input  v-model="editFormList.cat_level"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import {
  getCategories,
  AddCategories,
  getCategoriesById,
  EditCategoriesById,
  DeleteCategoriesById,
} from "../../utils/api";
export default {
  data() {
    return {
      // 查询条件
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      catelist: [],
      // 总数据条数
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          // 表示，将当前列定义为模板列
          type: "template",
          // 表示当前这一列使用模板名称
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
      // 控制添加分类对话框的显示与隐藏
      addCateDialogVisible: false,
      // 添加分类的表单数据对象
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      // 添加分类表单的验证规则对象
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
        ],
      },
      // 父级分类的列表
      parentCateList: [],
      // 指定级联选择器的配置对象
      cascaderProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      // 选中的父级分类的Id数组
      selectedKeys: "",
      // 控制修改分类对话框的显示与隐藏
      editDialogVisible: false,
      //通过id查询到的分类数据
      editFormList: [],
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取商品分类数据
    getCateList() {
      getCategories(this.querInfo).then((res) => {
        if (res.meta.status == 200) {
          let { result, total } = res.data;
          this.catelist = result;
          this.total = total;
        }
      });
    },
    // 监听 pagesize 改变
    handleSizeChange(newSize) {
      this.querInfo.pagesize = newSize;
      this.getCateList();
    },
    // 监听 pagenum 改变
    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage;
      this.getCateList();
    },
    // 点击按钮，展示添加分类的对话框
    showAddCateDialog() {
      this.addCateDialogVisible = true;
      //获取添加分类对话框的数据
      getCategories({ type: 2 }).then((res) => {
        if (res.meta.status == 200) {
          this.parentCateList = res.data;
        }
      });
    },
    // 监听对话框的关闭事件，重置表单数据
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = this.addCateForm.cat_pid = this.addCateForm.cat_level =
        "";
    },
    // 选择项发生变化触发这个函数
    parentCateChanged() {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        this.addCateForm.cat_level = this.selectedKeys.length;
      } else {
        this.addCateForm.cat_pid = this.addCateForm.cat_level = 0;
      }
    },
    addCate() {
      AddCategories(this.addCateForm).then((res) => {
        if (res.meta.status == 201) {
          this.$message.success("添加分类成功！");
          this.getCateList();
          this.addCateDialogVisible = false;
        }
      });
    },
    //显示编辑对话框并根据 id 查询分类
    async showEditDialog(id) {
      this.editDialogVisible = true;
      // const { data: res } = await this.$http.get(`categories/${id}`);
      getCategoriesById({ id }).then((res) => {
        if (res.meta.status == 200) {
          this.editFormList = res.data;
        }
      });
    },
    //修改分类数据
    editRoleInfo() {
      console.log(this.editFormList.cat_id);
      EditCategoriesById({
        id: this.editFormList.cat_id,
        cat_name: this.editFormList.cat_name,
      }).then((res) => {
        if (res.meta.status == 200) {
          this.$message.success("修改分类成功！");
          this.getCateList();
          this.editDialogVisible = false;
          console.log(this.getCateList);
        }
      });
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 根据Id删除对应的分类信息
    async removeCategoryById(id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该分类, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      DeleteCategoriesById({ id }).then((res) => {
        if (res.meta.status == 200) {
          this.$message.success("删除分类成功！");
          this.getCateList();
        }
      });
    },
  },
};
</script>

<style lang="less" scoped>
.el-cascader {
  width: 100%;
}
</style>